\chapter{Future Work}
Steam controller:
It is similar to a traditional game controller, but instead of using physical thumbsticks (e.g. the Xbox 360 controller), it has two programmable trackpads (see Figure \ref{fig:steamController}).  Instead of using the common rumble features, it implements dual linear resonant actuators that allows for a wide range of force and vibration in each trackpad. According to Valve, this gives more precise haptic capabilities compared to other controllers \citep{steam_controller}.